" Stating your intention to be helpful can lower defenses. When you tell somebody that you aren’t trying to bust their chops—that you really want to help—it can go a long way toward making them receptive to what you’re saying. Try a little preamble. For example, in your own words, say something like, “I’m going to describe a problem I see; I may be wrong, and if I am I hope you’ll tell me; if I’m not I hope my bringing it up will help you fix it. "
― Kim Malone Scott , Radical Candor: Be a Kickass Boss Without Losing Your Humanity